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Volume 08 Innovative Energy & Research
ISSN: 2576-1463 Advanced Energy Materials 2019
July 11-12, 2019
July 11-12, 2019 | Zurich, Switzerland
21st International Conference on
Advanced Energy Materials and Research
Structural modulation and enhanced thermoelectric properties of thermoelectric thin films
Ji-Yan Dai1, Chun Hung Suen1, Xiaodan Tang2 and Xiaoyuan Zhou2
1The Hong Kong Polytechnic University, Hong Kong
2Chongqing University, China
SnSe single crystals have been demonstrated to possess excellent thermoelectric properties. In this work, we
demonstrate a grain size control method in growing nano crystalline SnSe thin films through a glancing angle
pulsed laser deposition approach. Structural characterization reveals that the SnSe film deposited at a normal angle
has a preference orientation along an axis, while by contrast, the SnSe film deposited at a glancing angle develops a
nano pillar structure with the growth direction towards the incident atomic flux.The glancing angle deposition results
in a reduced grain size of the thin film and enhanced thermoelectric properties with increased see beck coefficient.
The enhancement of thermal power can be attributed to the increased potential barriers owing to the reduced grain
size and increased grain boundaries in the film. We also demonstrated this approach in other thermoelectric thin
films such as SnTe. This finding provides an alternative strategy to enhance thermoelectric performance of thin films.
Innov Ener Res 2019, Volume 08